Alright, let's work through 1285 times 9798 step by step
1285 × 9798 = 9798 × (1285)
+ 9798 × 5 which equals 48990
+ 9798 × 80 yielding 783840
+ 9798 × 200 that equals 1959600
+ 9798 × 1000 that equals 9798000

= 12590430
